✨ added refresh indicator

packages/clean_framework/example/lib/features/home/domain/home_entity.dart

@@ -1,25 +1,39 @@
 import 'package:clean_framework/clean_framework_core.dart';
 
+enum HomeStatus { initial, loading, loaded, failed }
+
+enum HomeRefreshStatus { initial, succeeded, failed }
+
 class HomeEntity extends Entity {
   HomeEntity({
     this.pokemons = const [],
     this.pokemonNameQuery = '',
+    this.status = HomeStatus.initial,
+    this.isRefresh = false,
   });
 
   final List<PokemonModel> pokemons;
   final String pokemonNameQuery;
+  final HomeStatus status;
+  final bool isRefresh;
 
   @override
-  List<Object?> get props => [pokemons, pokemonNameQuery];
+  List<Object?> get props {
+    return [pokemons, pokemonNameQuery, status, isRefresh];
+  }
 
   @override
   HomeEntity copyWith({
     List<PokemonModel>? pokemons,
     String? pokemonNameQuery,
+    HomeStatus? status,
+    bool? isRefresh,
   }) {
     return HomeEntity(
       pokemons: pokemons ?? this.pokemons,
       pokemonNameQuery: pokemonNameQuery ?? this.pokemonNameQuery,
+      status: status ?? this.status,
+      isRefresh: isRefresh ?? this.isRefresh,
     );
   }
 }

packages/clean_framework/example/lib/features/home/domain/home_ui_output.dart

@@ -2,10 +2,14 @@ import 'package:clean_framework/clean_framework_core.dart';
 import 'package:clean_framework_example/features/home/domain/home_entity.dart';
 
 class HomeUIOutput extends Output {
-  HomeUIOutput({required this.pokemons});
+  HomeUIOutput({
+    required this.pokemons,
+    required this.isRefresh,
+  });
 
   final List<PokemonModel> pokemons;
+  final bool isRefresh;
 
   @override
-  List<Object?> get props => [pokemons];
+  List<Object?> get props => [pokemons, isRefresh];
 }

packages/clean_framework/example/lib/features/home/domain/home_use_case.dart

@@ -3,6 +3,9 @@ import 'package:clean_framework_example/features/home/domain/home_entity.dart';
 import 'package:clean_framework_example/features/home/domain/home_ui_output.dart';
 import 'package:clean_framework_example/features/home/external_interface/pokemon_collection_gateway.dart';
 
+const _spritesBaseUrl =
+    'https://raw.githubusercontent.com/PokeAPI/sprites/master/sprites';
+
 class HomeUseCase extends UseCase<HomeEntity> {
   HomeUseCase()
       : super(
@@ -13,25 +16,40 @@ class HomeUseCase extends UseCase<HomeEntity> {
           ],
         );
 
-  void init() {
-    request<PokemonCollectionGatewayOutput, PokemonCollectionSuccessInput>(
+  Future<void> fetchPokemons({bool isRefresh = false}) async {
+    if (!isRefresh) {
+      entity = entity.copyWith(status: HomeStatus.loading);
+    }
+
+    await request<PokemonCollectionGatewayOutput,
+        PokemonCollectionSuccessInput>(
       PokemonCollectionGatewayOutput(),
       onSuccess: (success) {
+        final pokemons = success.pokemonIdentities.map(_resolvePokemon);
+
         return entity.copyWith(
-          pokemons: success.pokemonIdentities
-              .map(_resolvePokemon)
-              .toList(growable: false),
+          pokemons: pokemons.toList(growable: false),
+          status: HomeStatus.loaded,
+          isRefresh: isRefresh,
+        );
+      },
+      onFailure: (failure) {
+        return entity.copyWith(
+          status: HomeStatus.failed,
+          isRefresh: isRefresh,
         );
       },
-      onFailure: (failure) => entity,
     );
+
+    if (isRefresh) {
+      entity = entity.copyWith(isRefresh: false);
+    }
   }
 
   PokemonModel _resolvePokemon(PokemonIdentity pokemon) {
     return PokemonModel(
       name: pokemon.name.toUpperCase(),
-      imageUrl:
-          'https://raw.githubusercontent.com/PokeAPI/sprites/master/sprites/pokemon/other/dream-world/${pokemon.id}.svg',
+      imageUrl: '$_spritesBaseUrl/pokemon/other/dream-world/${pokemon.id}.svg',
     );
   }
 }
@@ -56,6 +74,7 @@ class HomeUIOutputTransformer
 
     return HomeUIOutput(
       pokemons: filteredPokemons.toList(growable: false),
+      isRefresh: entity.isRefresh,
     );
   }
 }

packages/clean_framework/example/lib/features/home/presentation/home_presenter.dart

@@ -13,14 +13,20 @@ class HomePresenter
 
   @override
   void onLayoutReady(BuildContext context, HomeUseCase useCase) {
-    useCase.init();
+    useCase.fetchPokemons();
+  }
+
+  @override
+  void onOutputUpdate(BuildContext context, HomeUIOutput output) {
+    if (output.isRefresh) {}
   }
 
   @override
   HomeViewModel createViewModel(HomeUseCase useCase, HomeUIOutput output) {
     return HomeViewModel(
       pokemons: output.pokemons,
       onSearch: (query) => useCase.setInput(PokemonSearchInput(name: query)),
+      onRefresh: () => useCase.fetchPokemons(isRefresh: true),
     );
   }
 }

packages/clean_framework/example/lib/features/home/presentation/home_ui.dart

@@ -24,18 +24,24 @@ class HomeUI extends UI<HomeViewModel> {
         ),
         bottom: PokemonSearchField(onChanged: viewModel.onSearch),
       ),
-      body: ListView.builder(
-        prototypeItem: SizedBox(height: 176), // 160 + 16
-        padding: EdgeInsets.symmetric(horizontal: 16),
-        itemBuilder: (context, index) {
-          final pokemon = viewModel.pokemons[index];
+      body: RefreshIndicator(
+        onRefresh: viewModel.onRefresh,
+        child: Scrollbar(
+          thumbVisibility: true,
+          child: ListView.builder(
+            prototypeItem: SizedBox(height: 176), // 160 + 16
+            padding: EdgeInsets.symmetric(horizontal: 16),
+            itemBuilder: (context, index) {
+              final pokemon = viewModel.pokemons[index];
 
-          return PokemonCard(
-            imageUrl: pokemon.imageUrl,
-            name: pokemon.name,
-          );
-        },
-        itemCount: viewModel.pokemons.length,
+              return PokemonCard(
+                imageUrl: pokemon.imageUrl,
+                name: pokemon.name,
+              );
+            },
+            itemCount: viewModel.pokemons.length,
+          ),
+        ),
       ),
     );
   }

packages/clean_framework/example/lib/features/home/presentation/home_view_model.dart

@@ -5,11 +5,13 @@ import 'package:flutter/foundation.dart';
 class HomeViewModel extends ViewModel {
   HomeViewModel({
     required this.pokemons,
+    required this.onRefresh,
     required this.onSearch,
   });
 
   final List<PokemonModel> pokemons;
 
+  final AsyncCallback onRefresh;
   final ValueChanged<String> onSearch;
 
   @override